Search Results - "Widiyastuti"

Engineering Materials to Enhance Light-to-Heat Conversion for Efficient Solar Water Purification by Setyawan, Heru, Juliananda, Juliananda, Widiyastuti, Widiyastuti

“…Water scarcity has become one of the most prevalent problems afflicting people throughout the world and is expected to grow worse in the future due limited…”
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Nitrogen-Doped Carbon Aerogels Prepared by Direct Pyrolysis of Cellulose Aerogels Derived from Coir Fibers Using an Ammonia–Urea System and Their Electrocatalytic Performance toward the Oxygen Reduction Reaction by Fauziyah, Mar’atul, Widiyastuti, Widiyastuti, Setyawan, Heru

“…In this paper, a new method using an ammonia–urea system was proposed to prepare cellulose aerogels from coir fibers as the starting material for non-ordered…”
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Production of cellulose aerogels from coir fibers via an alkali–urea method for sorption applications by Fauziyah, Mar’atul, Widiyastuti, Widiyastuti, Balgis, Ratna, Setyawan, Heru

“…Biodegradable cellulose aerogels have been successfully prepared from coir fibers using a sulfur-free method and NaOH–urea system. Sulfur was avoided during…”
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Enhanced Electrocatalytic Activity of Pt/3D Hierarchical Bimodal Macroporous Carbon Nanospheres by Balgis, Ratna, Widiyastuti, W, Ogi, Takashi, Okuyama, Kikuo

“…Proton exchange membrane fuel cells require electrocatalysts with a high platinum (Pt) loading, large active surface area, and favorable hydrodynamic profile…”
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Sulfonated Mesoporous Silica-Carbon Composite Derived from a Silicate-Polyethylene Glycol Gel and Its Application as Solid Acid Catalysts by Julaika, Shofiyya, Fadli, Agus Farid, Widiyastuti, Widiyastuti, Setyawan, Heru

“…Solid acid catalyst is a promising alternative to the counterpart homogeneous acid for esterification reaction from the viewpoint of reusability and…”
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Graphitization of Coconut Shell Charcoal for Sulfonated Mesoporous Carbon Catalyst Preparation and Its Catalytic Behavior in Esterification Reaction by Fahmi, Fahmi, Widiyastuti, Widiyastuti, Setyawan, Heru

“…Here, we reported the utilization of coconut shell charcoal used for solid acid catalysts and its performance in the esterification reaction of acetic acid and…”
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High-throughput production of magnetite nanoparticles prepared by the monopolar arrangement of iron electrodes in water by Nurlilasari, Puspita, Widiyastuti, Widiyastuti, Setyawan, Heru, Faizal, Ferry, Wada, Mitsuki, Wuled Lenggoro, I.

“…•Environmentally friendly process for magnetite nanoparticles production is proposed.•Alternating monopolar arrangement is superior than conventional…”
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Progress in the Preparation of Magnetite Nanoparticles through the Electrochemical Method by Setyawan, Heru, Widiyastuti, W.

“…Magnetite (Fe3O4) is one of the most important iron oxides due to its extensive range of application in various fields. The characteristics of magnetite can be…”
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The Enhancement Discharge Performance by Zinc-Coated Aluminum Anode for Aluminum–Air Battery in Sodium Chloride Solution by Sitanggang, Ruly Bayu, Nur’aini, Syarifa, Susanto, Susanto, Widiyastuti, Widiyastuti, Setyawan, Heru

“…The main drawback of seawater batteries that use the aluminum (Al)–air system is their susceptibility to anode self-corrosion during the oxygen evolution…”
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Photocatalytic Activity of ZnO/Ag Nanoparticles Fabricated by a Spray Pyrolysis Method with Different O2:N2 Carrier Gas Ratios and Ag Contents by Meditha Hudandini, Nurdiana Ratna Puri, Sugeng Winardi, Widiyastuti Widiyastuti, Manabu Shimada, Kusdianto Kusdianto

“…Wastewaters of the textile industry, e.g., those generated in Gresik, Indonesia, are a possible threat to the environment and should be treated before…”
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Spray-dried porous silica using an anionic surfactant template for advanced photoluminescence support via ultrasound-assisted deposition by Abdul Ajiz, Hendrix, Widiyastuti, W., Setyawan, Heru, Nurtono, Tantular

“…Ordered macroporous silica particles as a photomaterial transparent solid matrix were synthesized from sodium silicate (Na 2 SiO 3 ) as a silica source and…”
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Controlling N‑Doping Nature at Carbon Aerogels from Biomass for Enhanced Oxygen Reduction in Seawater Batteries by Susanto, Susanto, Nurtono, Tantular, Widiyastuti, Widiyastuti, Yeh, Min-Hsin, Setyawan, Heru

“…Pyridinic N-type doped at carbon has been known to have better electrocatalytic activity toward the oxygen reduction reaction (ORR) than the others. Herein, we…”
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Electro-assisted alignment of coir fiber cellulose aerogel with low tortuosity channels for solar steam generation by Juliananda, Juliananda, Suari, Ni Made Intan Putri, Widiyastuti, Widiyastuti, Setyawan, Heru

“…Biomass-derived substrates have high porosities and hydrophilic properties that match the requirements as substrate in a heat localization solar steam…”
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Preparation of rGO/MnO2 Composites through Simultaneous Graphene Oxide Reduction by Electrophoretic Deposition by Purwaningsih, Hariyati, Suari, Ni Made Intan Putri, Widiyastuti, Widiyastuti, Setyawan, Heru

“…We report the preparation of manganese dioxide (MnO2) nanoparticles and graphene oxide (GO) composites reduced by an electrophoretic deposition (EPD) process…”
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Correlations between Crystallite/Particle Size and Photoluminescence Properties of Submicrometer Phosphors by Wang, Wei-Ning, Widiyastuti, W, Ogi, Takashi, Lenggoro, I. Wuled, Okuyama, Kikuo

“…Correlations between crystallite/particle size and the luminescent characteristics of submicrometer phosphors were investigated. Spray pyrolyzed europium doped…”
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Hydrothermal Synthesis: Low−Temperature Subcritical Water for Ceria−Zirconia Mixed Oxides Preparation by Machmudah, Siti, Widiyastuti, Widiyastuti, Wahyudiono, Wahyudiono, Winardi, Sugeng, Kanda, Hideki, Goto, Motonobu

“…A low-temperature hydrothermal synthesis technique was employed as a medium to produce ceria−zirconia mixed oxides particles at temperatures of 200–300 °C and…”
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Fabrication of Hydrophobic Cellulose Aerogels from Renewable Biomass Coir Fibers for Oil Spillage Clean-Up by Setyawan, Heru, Fauziyah, Mar’atul, Tomo, Hendro Sat Setijo, Widiyastuti, Widiyastuti, Nurtono, Tantular

“…Hydrophobic cellulose aerogels with high porosities (~ 97.5%) were successfully prepared from renewable biomass coir fibers for use as absorbents for oil…”
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Sulfonated carbon aerogel derived from coir fiber as high performance solid acid catalyst for esterification by Fauziyah, Mar'atul, Widiyastuti, Widiyastuti, Setyawan, Heru

“…[Display omitted] •High-performance acidic carbon aerogel catalyst from coir fiber.•Individual carbon fibers in the aerogel have honeycomb-like porous…”
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Synthesis of magnetite nanoparticles by surfactant-free electrochemical method in an aqueous system by Fajaroh, Fauziatul, Setyawan, Heru, Widiyastuti, W., Winardi, Sugeng

“…A simple surfactant-free electrochemical method is proposed for the preparation of magnetite nanoparticles using iron as the anode and plain water as the…”
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Acid hydrolysis roles in transformation of cellulose-I into cellulose-II for enhancing nitrocellulose performance as an energetic polymer by Amelia, Sekar Tri Wulan, Widiyastuti, W., Nurtono, Tantular, Setyawan, Heru, Widyastuti, W., Ardhyananta, Hosta

“…Cellulose nitrate, commonly known as nitrocellulose (NC), is an energetic polymer with a broad function in industrial and military applications. The use of…”
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